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Finding the Fourth Proportional to 98,675.80, 147,581.70 and 88,221.40

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Solution

The fourth proportional to 98,675.80, 147,581.70 and 88,221.40 is: 131,945.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,675.80 : 147,581.70 = 88,221.40 : x
  2. Step 2: Convert to fraction form
    98,675.80/147,581.70 = 88,221.40/x
  3. Step 3: Cross multiply
    98,675.80x = 147,581.70 × 88,221.40
  4. Step 4: Simplify right side
    98,675.80x = 13,019,864,188.38
  5. Step 5: Solve for x
    x = 13,019,864,188.38/98,675.80
  6. Step 6: Final answer
    x = 131,945.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.